Guard for edge-trimmers and heel-trimmers.



R B. WARDWELL.

' GUARD FOR EDGE TRIMMERS AND HEEL TRIMMERS.

APPLICATION FILED "18.4, 1916.

1,186,151. Patented June's, 1916.

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ROBERT B. WARDWELL, 0F ,EXETER, NEw HAMPsHIRE.

GUARD .FOR EDGE TBIMMERS AND I-IEEL-TRIMMERS.

Specification of Letters Patent. Patnted June 6 1916,

Application filed. February 4, 1916. Serial No. 76,116.

To all whom it may concern:

Be it known that I, ROBERT B. WVARDWELL, a citizen of the United States, residing at Exeter, county of Rockingham, State of New Hampshire, have invented a certain new and useful Improvement in Guards for Edge-Trimmers and Heel; Trimmers, of which the following is a specification, reference being had therein to the accompanying drawings.

In the manufacture of boots andshoes it is customary to trim the edge of certain portions of the sole of the shoe by means of a cutter having a series of projecting blades, said cutter being caused to rotate rapidly. For the purpose of protecting the upper from the ends of the blades or knives on the cutter and to assist in guiding the shoe, the cutter is provided with a guard which is circular in shape and has a periphery which projects beyond the adjacent edges of the blades. This guard has in the past been held firmly against the cutter and has been caused to rotate with it as if the whole were one piece. The result has been that the edge of the guard rubs against the upper and produces friction enough to burn the upper. This is particularly true in the manufacture of patent and enamel shoes. Where the ordinary guard has been employed, it has frequently been necessary to repair the shoes after they have been trimmed by the edge cutter, to remedy the injury done by the edge cutter. This results in a very considerable expense.

My invention has for its object a new and improved guard for edge cutters which will do away altogether with the burning of the upper while at the same time serving to guide the shoe in the same manner as has been done in the past, by guards of the old and well known construction.

The invention will be fully understood from the following description when taken in connection with the accompanying drawings and the novel features thereof will be pointed out and clearly defined in the claims at the close of this specification.

In the drawings, Figure 1 is a face eleva tion of a cutter having applied thereto a guard embodying my invention. Fig. 2 is a side elevation of the parts shown in Fig. 1. Fig. 3 is a section on an enlarged scale. In this figure there has been indicated the position of the edge of the sole and the upper of the shoe in relation to the cutter and the guard. I 4

Referring to the drawings at 11 is shown the arbor or shaft to which is secured a cutter 12 having blades a.

At 13 is shown a nut by which the cutter is secured to the arbor.

At 1 1 is shown the main guard member which comprises a disk of metal having a hole centrally thereof to permit the screw threaded end of the arbor l1 topass through it. The guard is provided with an annular shoulder 6 adapted to rest against the adj acent face of the cutter and compress it against the arbor. It is also provided with an annular boss 0 which projects into the hole in the cutter. In these respects the guard is of the ordinary well known construction. Just outside the annular shoulder b there is formed an annular space of a size suitable to receive a ring 15 which is confined between the projecting edge of the guard 141 and the adjacent surfaces of the ends of the teeth of the cutter. The ring 15 projects beyond the teeth the amount necessary to enable this ring 15 to be inserted in the crease between the upper and the edge of the sole and serve to guide the shoe in the way in which the ordinary cutter guard guides the shoe. The ring 15 makes a loose fit between the cutter guard i l and the cutter 12 and is free to rotate relatively to the guard and cutter. It will, therefore, be seen that during the operation on the shoe the ring 15 is the only part which contacts with the upper and since the cutter and guard are free to rotate relatively to the ring, the ring 15 is not caused to revolve and therefore produces no friction against the upper of the shoei I find in practice that my improved cutter guard completely eliminates the objectionable burning of the upper, and saves expense and does away with delay in the manufacthe adjacent corners of the blades. Accordingly I make rings 15 having requisite widths of rim, and use with the guard 14 the ring which will project the proper distance beyond the corners of the blades. In this Way it is necessary to make only a single guard 1% and furnish with it a set of rings of different sizes thus doing away with the necessity of furnishing a set of complete guards. This results in .a considerable saving in expense.

lVhat I claim is:

1. The improved guard for edge cutters comprising a guard rotatable with the cutter, there being an annular space between the edge of the guard and the adjacent edges of the blades of the cutter, and a ring located. in said annular space and freely rotatable relatively to the guard and the cutter.

2. In combination, an edge cutter, a guard secured to one end of said cutter, said parts being arranged with an annular space be tween them, and a ring located in said annular space and projecting beyond the edges of the blades of the cutter and freely rotatable relatively to the guard and the cutter.

3. The improved guard for edge cutters comprising a guard rotatable with the cutter, said guard having an annular space formed in its face adjacent the cutter, and a ring located in said space and freely rotatable relatively to the guard and the cutter.

4. The improved guard for edge cutters comprising a guard secured to the cutter and rotating with it, said guard having an annular space formed in its face adjacent the cutter, and a ring located in said space and projecting beyond the edges of the blades of the cutter and freely rotatable relatively to the cutter.

In testimony whereof I afliX my signa ture, in presence-of two witnesses.

ROBERT E. VARDVELL. Witnesses ALBERT J. WVEEKs, A. S. COBURN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patezte. Washington, D. C. 

